package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.annotation.AutoFill;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.enumeration.OperationType;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import jakarta.servlet.http.Cookie;
import jakarta.servlet.http.HttpServletRequest;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;


@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 明文密码md5加密，然后再进行比对
        password=DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }


    // 员工注册
    public void register(EmployeeDTO employeeDTO) {
        Employee emp = new Employee();
        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, emp);
        //默认运行状态
        emp.setStatus(StatusConstant.ENABLE);
        //初始密码
        emp.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        //动态获取员工注册和修改操作，使用当前登录用户的id
        emp.setCreateUser(BaseContext.getCurrentId());
        emp.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.insert(emp);


    }

    // 员工信息查询
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO){
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page=employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        return new PageResult(total, page.getResult());
    }

    //员工账号禁用或启用
    public void updateStatus(Integer status, Long id) {
        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();
        employeeMapper.updateStatus(employee);
    }
    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee = employeeMapper.getById(id);
        //mapper的getById()查完全部信息再回到此处
        //即将return回去的employee里面也包括密码，这是不希望传到前端的
        //那么需要提前一步return且晚一步mapper查询（覆盖）在此设置一下密码******
        employee.setPassword("******");
        return employee;
    }
    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    @AutoFill(value = OperationType.UPDATE)
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        //前者赋给后者
        BeanUtils.copyProperties(employeeDTO, employee);
        //打包带走
        employeeMapper.update(employee);
    }

    /**
     * 修改密码
     * @param passwordEditDTO
     */
    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO, HttpServletRequest request) {

        Cookie[] cookies = request.getCookies();
        if (cookies == null){
            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }

        // 通过cookie获取用户的name
        String username = null;
        for (Cookie cookie : cookies) {
            if (cookie.getName().equals("username")) {
                username = cookie.getValue();
                break;
            }
        }

        // 获取旧密码
        Employee employee = employeeMapper.getByName(username);

        // 匹配旧密码
        if (!DigestUtils.md5DigestAsHex(passwordEditDTO.getOldPassword().getBytes()).equals(employee.getPassword())) {
            // 匹配失败，抛出业务异常
            throw new PasswordErrorException(MessageConstant.PASSWORD_EDIT_FAILED);
        }

        employee.setPassword(DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes()));

        employeeMapper.update(employee);
    }






}
